Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d61e9fbec34a7ec…

MALICIOUS

PDF

87.5 KB Created: 2021-09-04 14:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 01ee84d1846d1c98d750226dfd08d978 SHA-1: 7d4e8cc5c7130abe0a538c3310f5a9bc52348a8e SHA-256: 9d61e9fbec34a7ecc78067be33689220d78b7ec134c25c6183bbebbb8e65a784
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads or disposable hosting, suggesting a tactic to distribute malicious content or manipulate search engine results. The PDF's structure and embedded links are consistent with phishing or SEO spam campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://iziusb.com/userfiles//file/84814572475.pdf In PDF document text
    • https://mvpartners.be/images/uploadedimages/file/nivirut.pdfIn PDF document text
    • https://shiokerbau1.com/contents//files/62086013310.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/4c7q7tif4ft0p8ilhosgvag306/16261912796.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/pmlkj1745akbh0jfjpoq5taf4c/dijivawenanewewokadem.pdfIn PDF document text
    • http://dahchen.tw/userfiles/file/rilim.pdfIn PDF document text
    • https://krassimirtaskov.com/userfiles/files/56109387918.pdfIn PDF document text
    • http://apartamentosalbatros.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d6fceb30d7---70148063731.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/nojosabadegasedupovad.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/rf66fo6921uugk6sgdfkp5vd97/degelubefafupabufedu.pdfIn PDF document text
    • http://www.radiooro.com.mx/media/images/uploads/files/zewijixiworabetarun.pdfIn PDF document text
    • https://phunhai.net/upload/files/43486952661.pdfIn PDF document text
    • http://rauvuonsach.net/images/uploads/files/50453704419.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/usblq5ucrmdf3i2ps3schcvja5/16033148129.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/bdd4b2e920a2c3b5a5b268aa8e8125b8/98740388474.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb69f82687---28588377373.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/35099151294.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/vupefiv.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/lizatepakalez.pdfIn PDF document text
    • https://sieuthimaytinhcu.vn/upload/files/7563892629.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/kuzazopozor.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607882e2bf73d---95727314286.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/2fa6c634a34b3ce81bb71b507049f38c/51682903063.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/31868758786.pdfIn PDF document text
    • https://sharadsangam.org/UserFilesTwo/file/98613537761.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f05b1fc2d60---fozajonaxibuzadezezir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=lonely+planet+morocco+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001045d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045D 19772 bytes
SHA-256: 171b3effea6fc0db3f9c26592dc55c1b0de9771133eb38734844675303412d91
font_02_sfnt_off00013805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13805 10592 bytes
SHA-256: 96f25567bd30ac65921f5ad6040d8ccaad0f274617d14e40414e50c04315cc9d

Open this report in the interactive analyzer, or submit your own file for analysis.